Electric door opener



4ELECTRIC DOOR oPENB.

Patented July 1o, 1894.

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INVENTOR N BY Y WITNESSES.-

ATTORNEY 2 Sheets-Sheet 2.

(No Model.)

H F KBIL BLEGTRIG DooR OPENER.

Patented July 10, 1894.`

y, N Ma@ UNrTED STATES P-nT-ENT OFFICE. i

HENRY FRANCIS KEIL, OF NEW YORK, N. Y.

ELECTRIC DOOR-OPENER.

SPECIFICATION forming part of Letters Patent No. 522,733, dated July 10,1894.

Application filed January 30,1894. Serial No. 498,515- (No model.)

To all whom t may concern:

Be it known that I, HENRY FRANCIS Knit., a citizen of the United States,and a resident of New York, in the county of New York and State of NewYork, have invented a cer# tain new and useful Improved Electric Door`Opener, of which the following is a specica-` tion.

My invention relates to an improved elec,- tric door lock opener, inlwhich the locking jaw is released by the aid of electro-magnets, andthe object of myinvention is to overcome the many `difficulties nowexperienced in electric door openers in which the mechanism bccomesdisordered by reason of the complexity of their construction.

One of the chief objects attained by my construction is simplicity ofconstruction and consequent cheapness of manufacture and durability ofthe parts and non-liability to get out of order.

One of the main features of my construction lies in the manner ofassembling the parts without screwing them together. The boring of holesand threading them to receive screws is one of the chief items of costof construction.

Another important feature is the construction of the latch bar, by meansof which, by simply setting ascrew, I am enabled to center the lsame andthus prevent the looseness that i results by wear and by reason of whichthe door openers generally constructed heretofore soon become loose orthe locking dog inoperative.

Another very important feature is the novel construction of spring tothrow the latch.

Heretofore spiral springs have usually been wound around the latchshaft. It is well known that the setting of these springs is tedious andexpensive and entails much labor, and they cannot be replaced easily. Inmy construction I use a bow spring, made of a blade of spring steel, andI can use one or more according to the strength and force desired.Should this spring become lame, I can replace the same instantly.

In constructing my frame, I have provided a number of fixed studs andrecesses wherein the magnets and insulated parts are simply set and areheld in place by pressure, thus dispensing with the necessity of screws.I

have also so constructed the frame-work that I can readily cast theframe A and bring out a very clean casting, thus avoiding the necessityof filing od the ridges. Then I cutaway the siding of that part of theframe wherein the latch of the lock to be held in place sits.Heretofore, the frame has generally been cast with such opening, whichmade it difficult to avoid the casting and necessitated much tiling. Itis necessary to prevent objects being thrown into the lock through suchopening, and in my construction this part is cut away and every part soshaped that I can draw the cast frame after it is cooled without raisingrough parts. To provide a `covering for the lock recess, I stamp or casta metal cover with the part that is intended to iit over the recessinclined upward to fit snugly, and thus form a wall for the recess.

In the accompanying drawings, in which similar reference letters andnumerals designate like parts, Figure I is aplan view of the entireframe and mechanism, with the cover removed. Fig. 2 is a similar view ofthe frame or casting. Fig. 3 is asection on line 11, i

of Fig. 2. Fig. 4: is a section on line 2-2 of Fig. 2. Fig. 5 is an endelevation ofthe frame, partly broken away, and showing the cover insection. Fig. 6 is aplan view of the cover. Fig. 7 is a section on line3-3 of Fig. 6, looking in the direction of the arrow. Fig. 8 is asection on line 8-8 of Fig. l,A looking in the direction of the arrow.Fig. 9 is a section on line 9--9 of Fig. 1.

A represents the frame having the front wall a extended at the ends, asusual, and having the several studs and projections appearingin Fig. 2,all formed of a single casting. A space is formed in the back wall and jat each end of this space is formed an angle or cover h,while a stud 3projects upward about opposite the middle of the space. A plate I ofinsulating material is iitted to the space and crowded between thecorners ZL, 7L, and stud 3, and carries the binding screws i, 2, for thecircuit wires.

The magnets B are held in the frame by the plate h which unites the twospools iitting in angles h', 71.', formed in the back wall of the frame,and an upright or stud 2b which presses against the edges of the spoolheads.

The armature cis pivoted to upright 2 and IOO has an arm c3, which actsas adetent, as hereinafter described. To the armature c I tix athrow-off spring c which has the double function of throwing off thearmature cwhen the same is in a normal position, and acts as an electriccut-off.

The frame Ais provided with the latch lock chamber walls w, w, intowhich the lock latch L is fixed by means of a rod g, which passesthrough the end wall of the frame and through the shoulders of the locklatch and is fixed in the wall w; the frame has the upright h2 cast tothe end wall; this upright is enlarged at the bottom so as to be largeenough to receive the set screw j, by means of which the lock latchshaft d is held in a pivotal position; in

the corner of the frame is cast a projection 5 and very near it on theback wall is cast projection on; these projections are provided to holdthe spring f in place; the small studs 4, 4, are provided to hold thespring s', which is placed between the studs, and they are pressed orhammered down and hold the spring s rmly in place; stud 1 is providedwith a conical boring to receive the point d4 of the lock latch shaftd.

The shaft'd is pivoted on the point d5 of screw j, and by its point d4entering the conical recess in stud 1, and has the locking dog or arm dwhich normally lies under the `ar mature detent c3. The shaft also hastwo studs d2, d6, to prevent it from rocking too far in eitherdirection.

The upright 2 is centrallyscrew threaded at its top to receive a screwby means of which the cover la may be held in place.Y The upright 2, orthe frame near it, is provided with a stud 2, which serves to preventthe armature from being thrown back too far; the upright 2b is providedto hold the magnets in place without the aid of screws.

B, B, are magnets to which are fixed the electric wires which areconnected with a battery and push button, not shown, and by means ofwhich the magnets are energized.'

The lock latch L has a nose n and the rounded back n', as usual, and thestop or detent L the end of which lits a recess in shaft d, andconsequently until shaft d is released so that it may be turned the locklatchL cannot turn on its rod g.

The spring f has one end fitted to a recess n2 in the lock latch andserves to restore the latter to its normal position after it has beenswung by the door spring.

When the parts are all properly assembled as shown, and the magnets areenergized by the electric current, the armature is drawn to the cores ofthe magnets and thereby the detent c3 of the armature is drawn from theend of the lock dog d and the same is released. The moment the lock dogis released the spring f comes into play and the nose of the lock latchis forced back by the latch of the door lock and the door will open. Itmay be here stated that all doors which are provided with an electricopener have a spring fixed between the door and jam, and thus the dooralways has a tendency to open, and the moment the lock latch of the dooropener is released they door is thrown open.

YIt is obvious that I may use a spiral spring in place of the iiatspring f, since it will not become lame so quickly.

It is obvious that as soon as the current of electricity which energizesthe magnets is cut O by removing the pressure from the button, thearmature is released and thrown back by the armature spring c', rand thedetent c3 is thrown over the end of the lock do@ ol and the o ener isagain in a normal condition; the pressure of the door latch having beenremoved from the nose of latch lock,

' the same is forced into its normal condition by the spring f.

Having now described my invention, what I claim is- 1. In an electricdoor opener, comprising in its construction a cast frame A having thespace in the back wall with the shoulders h, h,- the shoulders h', h',to receive the magnet plate; the stud l; the stud 2; the stud 2a; thestud 2b; the stud 3; the studs 4:, 4; the studs 5, 5a; the stud d2; thewalls w, w, and the stud h, all arranged as and for the purpose setforth.

2. In an electric door opener, the combination of the magnets B, B, thestud 2b, and the recess h', h for holding saidmagnets; the armature chaving the spring c and the detent c3 and the insulating plate I havingthe posts t', i2, and the circuit wires, all arranged substantially asset forth.

3. The combination of the magnets, the insulating plate, the armature,the locking dog shaft having one end conicaliy bored and the'

